[PATCH 0/6] selftests/bpf: Fixes and improvements for libarena

This patchset addresses issues and feature gaps in libarena's existing
code, and optimizes some common code paths.

Patch 1 fixes up an inconsistency in the SPDX tags.
Patch 2 incorporates a followup patch for bitmaps that inlines
the nonatomic versions of the set/clear/test operations.
Patch 3 makes it safe to use the arena allocator under IRQ reentrancy.
Ensuring the allocator is correct under NMIs will be addressed in a
subsequent patch because it is a larger change.
Patches 4 to 6 add a calloc() interface for the allocator, along with
a benchmark that is useful for quickly finding obvious regressions
during development.

Signed-off-by: Emil Tsalapatis <[email protected]>

Emil Tsalapatis (6):
  selftests/bpf: libarena: Normalize SPDX headers across files
  selftests/bpf: libarena: Inline nonatomic bitmap operations
  selftests/bpf: libarena: Disable IRQs during allocation
  selftests/bpf: libarena: Add calloc() call
  selftests/bpf: libarena: Add a benchmark for malloc()/calloc()
  selftests/bpf: libarena: Optimize and make public arena_memset

 tools/testing/selftests/bpf/Makefile          |  18 +-
 tools/testing/selftests/bpf/bench.c           |   6 +
 .../selftests/bpf/benchs/bench_libarena.c     | 210 ++++++++++++++++++
 .../bpf/benchs/run_bench_libarena.sh          |  31 +++
 tools/testing/selftests/bpf/libarena/Makefile |  31 ++-
 .../bpf/libarena/benchs/bench_malloc.bpf.c    |  51 +++++
 .../libarena/include/bpf_arena_spin_lock.h    |   2 +-
 .../bpf/libarena/include/bpf_atomic.h         |   2 +-
 .../bpf/libarena/include/bpf_may_goto.h       |   1 +
 .../bpf/libarena/include/libarena/bitmap.h    |  30 ++-
 .../bpf/libarena/include/libarena/common.h    |  71 ++++++
 .../bpf/libarena/selftests/test_bitmap.bpf.c  |   3 +
 .../selftests/bpf/libarena/src/asan.bpf.c     |  21 +-
 .../selftests/bpf/libarena/src/bitmap.bpf.c   |  18 --
 .../selftests/bpf/libarena/src/buddy.bpf.c    |  44 ++--
 .../selftests/bpf/libarena/src/common.bpf.c   |  27 ++-
 16 files changed, 489 insertions(+), 77 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/benchs/bench_libarena.c
 create mode 100755 tools/testing/selftests/bpf/benchs/run_bench_libarena.sh
 create mode 100644 tools/testing/selftests/bpf/libarena/benchs/bench_malloc.bpf.c

-- 
2.54.0